Improvement in revivifying bone-black



J. FORREST.

Treating Bone Black.

Patented Aug. 25. 1863.

InventonY czflw Withesses:

UNITED STATES PATENT OFFICE.

JOSEPH FORREST, 0F xEw YORK, N. 11

IMPROVEMENT IN REVlVlFYlNG BONE-BLACK.

Speeit'h-ation forming part f Letters Patent N 39,63'1, dated August 25,1rt'2 To all irhom it may eoneern Be it known that l. Jostlltt Fomms'r. of the eity. county, and State of New York, engineer, have invented a new. usetul. and lotproved lt'oeess' for Drying Bone lilaek. and the Apparatus theretor: and I do herehy declare that the hest mode whieh I hare dist-orered for performing said proeess is tlest'sihetl in the following speeitieation. with the hest appa 'atus whieh I hare devised or found for perft'irmin; said proeess.

The nature of toy invention consists in a new mode or proeess of drying houehlaek hy toreing heated air in among or through it to carry oh the moisture: also, in heatitn. the vessels or retorts eontaining: the ln tie hlatk at the same time that th airis fort-ed through them; also. in a wenliarly-eonstrtteted appalatus provided with retorts toreontainin' he hone-hL-telt, and a fnrnaee and pipes for heating the air and eonduetin; it into the tetorts among the hone-hlaek to he dried.

To enahle others skilled in the art to use my improved proeess and apparatus.l will proceed to dt-sttl'il e hoth. referring to the aceompanyin; drawings. in whieh the same letters of ret'erenee indieate like parts in eaeh ot" the figures.

Figure 1 is a front elevation of my improved apparatus tordryinghone-hlaelt. Fig. 1. is a plan or top View of the same. Tltt'lefi half of the front in the first and the left half ot' the top in the seeoiid n; -ure are omitted to show the interior.

In these drawing A is the front of the furnaee or kiln. l; the t p. (3 C the sides, and l) the hat-k. all of whieh may he huilt of hrielt. e.\eept the top, whieh I make of metal and line with hriek, or it may he made of hriel; hy arehing' it. In this ltiln. at a proper distanee from the h ttom. 1 make a tloor, li and support it hy eolntnns and arehes or otherwise. with an opening in it for the grate l. ()n eaeh side and at the rear end of the ;:rate I build strong walls I F, of tire-hriek. or faee the inside with tire-hrielt. to forni a furnaee for the tuel'. and malte an opening, in the haek for the smoke to eseape or pass into a title or chimney.

The door 11in the I I a front is for the purposeof supplying fuel to the t'urnaee, and there is an aslrho'x. I.- under the grate l". The air pi es J .l are arranu l on the walls I and eonneeted hy the pip K K, whieh pass tip and over the tire in the fttrnuee and eoaduet the air hlown in through the supply pipe L over and aeross the fire to heat it. when it is eonduet'ed h the pipe M into the disttihnting pipe X. whieh surround the walls \t'ltlt'll pipe S is provided with hraneh pipes l l; whieh eomlnet the heated air into the retort Q t), whieh retotts me made of iron and arranged so far frotn th furnace that they wiEL' not he heated so a t which may he drawn to let down the. dri d hone-Mark. These retorts may hetilled tilt dry hone l lutl; up to the pipe whieh eondtu't the heated air into them. or a little ahore. and the upper part tilled with the lmHU-blilt'h to he dried, a tire made in tae furnaee. and the hlowing apparatus set to work: and wh n the hone-hlaek hhoYe the air-pipes has d ned stttli 'iently the slide It may he drawn and the (-old hone-hlaelt in the lower part of the t"et rt let oatt and let the hot dry honehlaek in the upper part down into the l wer part I" eool. while more is lwitig" drie l iu the upp r part of the retort The upper end f the retorts are supported hy iron plates an that part of the top I; orer th fu'rnaee is lined with tirehrieh seenred h iron in some tt- \'enient manner.

may he an air-punip hellows. t'atnor-othet' deviee whieh has sutih-i nt power or foree t hlow theairthrough th pipesand hone-hhtt'k to be dried.

I heliere I hate dest'tihed my itnpiott'd proeess for drying hone hlaelt. and the app"- t'atus used t perform the same, so as to enahle any person skilled in the art to malt! The s pply pipeh tnust l t eonneeted with the hlowing apparatus, hieh iiu- :i] ]NH;IHS and porilmn'tlur process witbvessel (*Onmining it (the bore-black) at the out iurihvr iuvemiuu 0r experiu vm. same time.

1 iii nuw 5121i? what [ciaim and desire to 3. The apparatus described, for the purpose secure by Letters Patent-t0 wit: specified.

1. Drying bone-black by forcing heated air JOSEPH FORREST. through it. substantially as described. \Vitnesses:

2. 1n (l iii illiliiflfl with heated air fun-ed ISAAC \V. DEAN. through tin Mme i nu'iz. applying heat tu the EDWARD M. SKIDMORE. 

